Would your 5/8-11 Brass Male to Male Fitting fit on the Glastar 12” lap grinder to enable me to use one of your grinding domes or cones? If not, is there an alternative you could recommend so I may use the grinding cones?

Hello, There is no attachment available for glastars grinders. If you have a drill press you can get the smoothing and polishing cone and domes with a straight shaft to be able to use in a drill press. They do not make the elecrtoplated cones and domes with the straight shaft so that will be your limitation. Sorry there is nothing to fit your current machine.